Inserted the smarty sim and everything lights up but can't seem to utilise the external antenna I bought.It has three internal but this house is impervious to wifi.I just screwed in the sma 'bingfu' aerial and held it outside but there's no signal (I held the router outside too).My phone will work outside but a router/aerial should be as good or better? The router is singel aerial port but people seem to use them fairly well on youtube.